Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Question
Chapter 14, Problem 31RQ
To determine
Whether the statement "If the differential of a motor control is set too small the motor may short cycle" is true or false.
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Chapter 14 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 14 - Why is a low-voltage thermostat normally more...Ch. 14 - The three kinds of switching mechanism used in...Ch. 14 - Prob. 3RQCh. 14 - What does a cold anticipator do?Ch. 14 - Define system overshoot when dealing with...Ch. 14 - Prob. 6RQCh. 14 - Prob. 7RQCh. 14 - Describe the method a service technician should...Ch. 14 - Explain how microelectromc or electrontc...Ch. 14 - Prob. 10RQ
Ch. 14 - What component steps down the voltage to the...Ch. 14 - Low voltage is desirable for residential control...Ch. 14 - What is the maximum amperage usually encountered...Ch. 14 - Prob. 14RQCh. 14 - Prob. 15RQCh. 14 - What two types of switches are normally found in...Ch. 14 - Prob. 17RQCh. 14 - Prob. 18RQCh. 14 - Why is a line-voltage thermostat mounted on an...Ch. 14 - What is the principle of operation for most...Ch. 14 - Describe a method for speedmg up the cooling of an...Ch. 14 - Describe two methods for cooling an overheated...Ch. 14 - How can an electronic thermometer be used in a...Ch. 14 - A temperature-sensing device used in measuring...Ch. 14 - How does a thermocouple change with a temperature...Ch. 14 - True or False: Pressures below atmospheric...Ch. 14 - Name one function of the low-pressure control.Ch. 14 - Which is true of a high-pressure control? A. It...Ch. 14 - Name two types of water pressure control.Ch. 14 - Why should a safety control not be adjusted if it...Ch. 14 - Prob. 31RQCh. 14 - True or False: A change in the differential...Ch. 14 - True or False: A change in the differential of a...Ch. 14 - Prob. 34RQCh. 14 - Explain what is meant by the range of a...
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- When installing a motor control system, list four major factors to consider concerning the power system.arrow_forwardTrue or False: If a sleeve bearing fails in a small, fractional horsepower motor, the motor is generally replaced.arrow_forwardAn open winding in an electric motor means that A. the winding is making contact with the motor frame. B. one winding is making contact with another winding. C. a wire in one winding is broken. D. the centrifugal switch to the start winding is open.arrow_forward
- There is a short circuit in an electric motor winding when A. there is an adverse weather condition. B. a winding conductor is worn bare and touches anotherpart of the conductor that is also bare. C. there is a defect in the centrifugal start switch. D. the motor will not start.arrow_forwardWhat causes an overload protection device to function?arrow_forward1. Why pulley have different diameters 2. Parts and functions of the squirrel cage induction motorarrow_forward
- Explain why controlling the rotor current also controls the stator current.arrow_forwardWhat is the operating voltage of most magnetic control systems?arrow_forwardA control circuit voltage drop test shows a 1.1 volt drop at the starter S terminal. Which of the following could be the cause? High resistance in the solenoid switch circuit High resistance in the clutch safety switch Loose battery cable connection Short in the starter armature windingsarrow_forward
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